module-raop: Add support for auth_setup

This step is required by some devices.

Co-authored-by: Christian Glombek <lorbus@fedoraproject.org>

src/modules/module-raop-discover.c

@@ -223,6 +223,8 @@ static void pw_properties_from_avahi_string(const char *key, const char *value,
 		 *  4 = FairPlay SAPv2.5. */
 		if (str_in_list(value, ",", "1"))
 			value = "RSA";
+		else if (str_in_list(value, ",", "4"))
+			value = "auth_setup";
 		else
 			value = "none";
 		pw_properties_set(props, "raop.encryption.type", value);

src/modules/module-raop-sink.c

@@ -130,6 +130,7 @@ enum {
 enum {
 	CRYPTO_NONE,
 	CRYPTO_RSA,
+	CRYPTO_AUTH_SETUP,
 };
 enum {
 	CODEC_PCM,
@@ -988,7 +989,7 @@ static int rtsp_do_announce(struct impl *impl)
 	char iv[16*2];
 	int res, frames, i, ip_version;
 	char *sdp;
-        char local_ip[256];
+	char local_ip[256];
 
 	host = pw_properties_get(impl->props, "raop.hostname");
 
@@ -1048,6 +1049,32 @@ static int rtsp_do_announce(struct impl *impl)
 	return res;
 }
 
+static void rtsp_auth_setup_reply(void *data, int status, const struct spa_dict *headers)
+{
+	struct impl *impl = data;
+
+	pw_log_info("reply %d", status);
+
+	impl->encryption = CRYPTO_NONE;
+
+	rtsp_do_announce(impl);
+}
+
+static int rtsp_do_auth_setup(struct impl *impl)
+{
+	int res;
+
+	char output[] = 
+		"\x01"
+		"\x59\x02\xed\xe9\x0d\x4e\xf2\xbd\x4c\xb6\x8a\x63\x30\x03\x82\x07"
+		"\xa9\x4d\xbd\x50\xd8\xaa\x46\x5b\x5d\x8c\x01\x2a\x0c\x7e\x1d\x4e";
+
+	res = pw_rtsp_client_url_send(impl->rtsp, "/auth-setup", "POST", &impl->headers->dict,
+			"application/octet-stream", output, rtsp_auth_setup_reply, impl);
+
+	return res;
+}
+
 static const char *find_attr(char **tokens, const char *key)
 {
 	int i;
@@ -1168,7 +1195,10 @@ static void rtsp_options_reply(void *data, int status, const struct spa_dict *he
 		rtsp_do_auth(impl, headers);
 		break;
 	case 200:
-		rtsp_do_announce(impl);
+		if (impl->encryption == CRYPTO_AUTH_SETUP)
+			rtsp_do_auth_setup(impl);
+		else
+			rtsp_do_announce(impl);
 		break;
 	}
 }
@@ -1648,6 +1678,8 @@ int pipewire__module_init(struct pw_impl_module *module, const char *args)
 		impl->encryption = CRYPTO_NONE;
 	else if (spa_streq(str, "RSA"))
 		impl->encryption = CRYPTO_RSA;
+	else if (spa_streq(str, "auth_setup"))
+		impl->encryption = CRYPTO_AUTH_SETUP;
 	else {
 		pw_log_error( "can't handle encryption type %s", str);
 		res = -EINVAL;

src/modules/module-raop/rtsp-client.c

@@ -273,12 +273,30 @@ static int process_input(struct pw_rtsp_client *client)
 			int cseq;
 			struct message *msg;
 			const struct spa_dict_item *it;
+			const char *content_type;
+			unsigned int content_length;
 
 			spa_dict_for_each(it, &client->headers->dict)
 				pw_log_info(" %s: %s", it->key, it->value);
 
 			cseq = pw_properties_get_int32(client->headers, "CSeq", 0);
-
+			content_type = pw_properties_get(client->headers, "Content-Type");
+			if (content_type != NULL && strcmp(content_type, "application/octet-stream") == 0) {
+				pw_log_info("binary response received");
+				content_length = pw_properties_get_uint64(client->headers, "Content-Length", 0);
+				char content_buf[content_length];
+				res = read(client->source->fd, content_buf, content_length);
+				pw_log_debug("read %d bytes", res);
+				if (res == 0)
+					return -EPIPE;
+				if (res < 0) {
+					res = -errno;
+					if (res != -EAGAIN && res != -EWOULDBLOCK)
+						return res;
+					return 0;
+				}
+				pw_properties_set(client->headers, "body", content_buf);
+			}
 			if ((msg = find_pending(client, cseq)) != NULL) {
 				msg->reply(msg->user_data, client->status, &client->headers->dict);
 				spa_list_remove(&msg->link);
@@ -466,7 +484,7 @@ int pw_rtsp_client_disconnect(struct pw_rtsp_client *client)
 	return 0;
 }
 
-int pw_rtsp_client_send(struct pw_rtsp_client *client,
+int pw_rtsp_client_url_send(struct pw_rtsp_client *client, const char *url,
 		const char *cmd, const struct spa_dict *headers,
 		const char *content_type, const char *content,
 		void (*reply) (void *user_data, int status, const struct spa_dict *headers),
@@ -485,7 +503,7 @@ int pw_rtsp_client_send(struct pw_rtsp_client *client,
 
 	cseq = ++client->cseq;
 
-	fprintf(f, "%s %s RTSP/1.0\r\n", cmd, client->url);
+	fprintf(f, "%s %s RTSP/1.0\r\n", cmd, url);
 	fprintf(f, "CSeq: %d\r\n", cseq);
 
 	if (headers != NULL) {
@@ -519,3 +537,12 @@ int pw_rtsp_client_send(struct pw_rtsp_client *client,
         }
 	return 0;
 }
+
+int pw_rtsp_client_send(struct pw_rtsp_client *client,
+		const char *cmd, const struct spa_dict *headers,
+		const char *content_type, const char *content,
+		void (*reply) (void *user_data, int status, const struct spa_dict *headers),
+		void *user_data)
+{
+	return pw_rtsp_client_url_send(client, client->url, cmd, headers, content_type, content, reply, user_data);
+}

src/modules/module-raop/rtsp-client.h

@@ -71,6 +71,12 @@ int pw_rtsp_client_disconnect(struct pw_rtsp_client *client);
 int pw_rtsp_client_get_local_ip(struct pw_rtsp_client *client,
 		int *version, char *ip, size_t len);
 
+int pw_rtsp_client_url_send(struct pw_rtsp_client *client, const char *url,
+		const char *cmd, const struct spa_dict *headers,
+		const char *content_type, const char *content,
+		void (*reply) (void *user_data, int status, const struct spa_dict *headers),
+		void *user_data);
+
 int pw_rtsp_client_send(struct pw_rtsp_client *client,
 		const char *cmd, const struct spa_dict *headers,
 		const char *content_type, const char *content,